South Korean maneuvers draw threat from North

A South Korean navy ship participates in drills in the Yellow Sea this week.Just two weeks after joint drills with the U.S. Navy, South Korea's military is carrying out five days of military exercises in the Yellow Sea.

The South Korean navy, army, air force and marines are practicing techniques for detecting and evading North Korean submarines and guided missiles, South Korea's Yonhap news agency reported Saturday. The exercise involves 20 ships and 4,500 troops, according to Yonhap.